The orange-red luminous luminous powder is divided into two kinds of materials: sulfide and sulfur oxide. After absorbing various visible light (sunlight or light), it emits orange-red light in the dark, and the sulfide can continue to emit light for more than 1 hour. Sulfur oxides can continue to illuminate for more than 2 hours. The material does not contain any radioactive material.

1) The particle size unit is μm and is characterized by a central particle diameter D50.

(2) The unit of brightness is mcd/m2, the detection is performed according to the DIN67510 standard, and the illumination of the D65 standard light source is 1000 LX for 5 min, and the afterglow brightness of 1 min is detected.